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Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
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Network Neuroscience of Human Multitasking: Local Connections Matter.

Marie Mueckstein1,2, Kirsten Hilger3, Stephan Heinzel4,5

  • 1International Psychoanalytic University, Berlin, Germany.

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|December 15, 2025
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Summary
This summary is machine-generated.

Multitasking costs may stem from local brain connectivity changes, not global ones. This study found that modality-specific crosstalk correlates with local functional connectivity, particularly between frontal and auditory regions.

Keywords:
crosstalkdual taskexecutive controlfunctional connectivitymodality compatibility

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Human Brain Imaging

Background:

  • Multitasking incurs costs, debated to arise from task representation overlap and cognitive control demands.
  • Modality-based crosstalk, involving modality-specific representation overlap, is a proposed contributor to multitasking costs.
  • Existing research links modality-compatibility effects to auditory cortex overlap but questions the role of global brain connectivity and the fronto-parietal control network.

Purpose of the Study:

  • To investigate whether modality-based crosstalk in multitasking arises from overlapping global brain connectivity patterns.
  • To determine if resolving multitasking costs requires additional involvement of the fronto-parietal control network.
  • To examine the relationship between the modality-compatibility effect and functional connectivity (FC) using functional imaging.

Main Methods:

  • Functional imaging study involving 64 healthy young adults performing multitasking tasks.
  • Functional connectivity (FC) analysis was employed to assess network similarities and differences.
  • Comparison of FC similarity/dissimilarity between single-task networks and global connectivity of the control network during dual tasks.

Main Results:

  • No significant differences in FC dissimilarities were found between single-task networks for different modality pairings.
  • The fronto-parietal control network did not show additional involvement during dual tasks when assessed via global connectivity.
  • Post hoc analysis revealed a correlation between the behavioral modality-compatibility effect and local FC between lateral frontal and auditory regions.

Conclusions:

  • Multitasking costs, specifically the modality-compatibility effect, are associated with local functional connectivity changes rather than global ones.
  • The findings support the modality-based crosstalk hypothesis, suggesting localized interactions between frontal and auditory regions.
  • Behavioral differences in multitasking performance may be explained by specific local connectivity alterations, not necessarily global network dynamics.